This is the first biography of Marc Bloch (1886-1944), historian, soldier in both world wars, and leader of the Resistance, who was captured, tortured, and died a heroic death. Based largely on Bloch's private letters, diaries and papers, as well as on other unpublished documents, it traces the remarkable life of this French-Jewish patriot under the Third Republic. As an historian, Bloch is perhaps best known for The Historian's Craft, an inspiring set of meditations on his life's work, and as co-founder of the now legendary journal Annales, which gave rise to a major school of historical writing. Profoundly influenced by the dark events that shaped his era - world wars, anti-semitism, and totalitarianism - Bloch has become something of an intellectual hero of our century, his life an epitome of the endeavour to uphold, in the face of such events, the spirit of unfettered critical enquiry.